Windows using identical route cost metrics [unreliable]. Search this site. Network Manager. No separated action is needed. Its main features are:monitor traffic activity per network interface get detailed info about each network interface i. Report abuse. Define different port rules for each website.
If you use the same set of load-balanced servers for multiple applications or websites, port rules are based on the destination virtual IP address using virtual clusters. Direct all client requests to a single host by using optional, single-host rules. NLB routes client requests to a particular host that is running specific applications.
Enable Internet Group Management Protocol IGMP support on the cluster hosts to control switch port flooding where incoming network packets are sent to all ports on the switch when operating in multicast mode. NLB logs all actions and cluster changes in the event log. NLB is installed as a standard Windows Server networking driver component.
The following figure shows the relationship between NLB and other software components in a typical configuration. Provides Network Load Balancing Tools to configure and manage multiple clusters and all of the hosts from a single remote or local computer. Enables clients to access the cluster by using a single, logical Internet name and virtual IP address, which is known as the cluster IP address it retains individual names for each computer.
NLB allows multiple virtual IP addresses for multihomed servers. Enables NLB to be bound to multiple network adapters, which enables you to configure multiple independent clusters on each host.
Support for multiple network adapters differs from virtual clusters in that virtual clusters allow you to configure multiple clusters on a single network adapter. Can be configured to automatically add a host to the cluster if that cluster host fails and is subsequently brought back online.
From the features list select Network Load Balancing and proceed with the installation. Note that Powershell support for NLB will also be installed:. Now enter the local server IP address and click on Connect. Select one of the available network interfaces that will be part of the NLB process and proceed with the following section.
Note that you can add multiple IP addresses for one host. Continue the wizard by pressing the Next button. This IP address is not physically assigned to a network card and instead a virtual network adapter is created. Note that you can add multiple IPs for load balancing, but the first one will be considered the primary address.
For testing purposes I will add a random IP address:. The next section is used to configure cluster parameters. Enter the cluster full internet name in my example cluster1. A NLB cluster must operate in one of the following modes:. Unicast — the MAC address of the cluster virtual network adapter is shared with all cluster nodes.
By using only one network adapter on each server, communication will be made only with devices that are part of the same subnet as the given node. All devices from all subnets can communicate with the node, but multicasting is used for cluster communication. From the three available options, choose multicast and proceed with the next section:. A high availability system reliably provides an acceptable level of service with minimal downtime.
To provide high availability, NLB includes built-in features that can automatically:. Scalability is the measure of how well a computer, service, or application can grow to meet increasing performance demands. For NLB clusters, scalability is the ability to incrementally add one or more systems to an existing cluster when the overall load of the cluster exceeds its capabilities. To support scalability, you can do the following with NLB:.
Balance multiple server load requests from the same client or from several clients across multiple hosts in the cluster. Enable high performance and low overhead through a fully pipelined implementation. Pipelining allows requests to be sent to the NLB cluster without waiting for a response to a previous request. Specify the load balancing behavior for a single IP port or group of ports by using port management rules.
Define different port rules for each website. If you use the same set of load-balanced servers for multiple applications or websites, port rules are based on the destination virtual IP address using virtual clusters. Direct all client requests to a single host by using optional, single-host rules. NLB routes client requests to a particular host that is running specific applications.
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